2025-03-14_PERMIT FILE - M2025016 (22)

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// PAGE 3 EXHIBIT L Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A Regular Impact (112) Construction Permit Application – Colorado Division of Reclamation Mining and Safety, Office of Mined Land Reclamation will not be reclaimed under the terms of this permit unless otherwise re-affected beyond their original state. Public Lands and other easements and rights-of-way are offset from operations and while they may fall within the 196.4± acre parcel – are excepted from the permit conditions to the extent of their approved setbacks. The following estimates use assumptions based upon the pre-disturbed state of the application for purposes of determining estimated costs of reclamation and correlated financial warranty. Where appropriate, information is generalized and approximated from similar estimates determined by the Division of Reclamation, Mining and Safety (DRMS), as indicated. Based upon the Extraction and Reclamation Plans of this application, the status and trend of activities and affected land, and related calculations to estimate reclamation liability, are determined as follows. Please Note: Due to the difficulty of calculating heavy equipment costs similar to the Division’s software program, unit costs from previous and reasonably current Division estimates of like or similar kind have been used to create a reasonably close estimate. The per unit basis from Division records are shown in the calculation tables throughout this Exhibit, Before concurrent grading, re-soiling, and revegetation for reclamation can commence, a perimeter keyway (dewatering trench) must first circumnavigate the area where the perimeter slopes form along the extraction limits. For the Cogburn site, this includes three sequential areas of extraction: • 10.4± Acres – Pit P125_S1 – South pit • 22.1± Acres – Pit P125A – Eastern pit • 28.2± Acres – Pit P125B – Central pit Exhibit L – Financial Warranty Map shows Initial Extraction as a yellow hatch area, comprising 60.7± acres. Extraction will begin in the southwest corner of Pit P125_S1 and establish a keyway along the western pit boundary, then advance northeastward. Initial Extraction will then progress through Pit P125A, then P125B, as indicated by the arrows on the map. Discharge points from all three pits shall be adjacent to the settling basin, planned to be located outside the southwest corner of Pit P125A. There is a tank battery located at the southeastern border of Pit P125_S1; approximately 1,360 feet of oil and gas pipeline located between Pits P125_S1 and P125A; and one abandoned oil and gas well each (two total) within the extraction extents of Pits P125A and P125B, both of which are pending removal. Extraction will not occur within the setbacks detailed in Exhibit D – Extraction Plan. Perimeter keyway extraction will maintain a perimeter slope no steeper than 1.25H:1V, except for depths greater than 30 feet below ground surface (bgs), which will be lined and backfilled at 3H:1V following extraction (refer to the Slope Stability Analysis addendum for additional information). At the toe of the cut perimeter slope is the keyway that runs below the extracted deposit of the basin, into the bedrock, which allows the subsurface waters to flow to the settling basin and discharge pumps necessary to keep the cut basin dry during a time of extraction and reclamation of the affected perimeter slopes. The keyway dimensions may vary from 4± to 8± feet in depth and 4± to 16± feet in width. Extraction must be broad enough to allow equipment to safely approach the toe and excise the bed dimensions where the resulting channel is sufficient to convey the groundwaters to the settling basin for discharge.